What was found
MCN - MAJOR REPAIR - DURING B-04 CHECK GALVANIC CORROSION WAS FOUND ON FLOORBEAM SEAT RAIL AT FR 66, Y1292 RT. MAINTENANCE REMOVED DAMAGED FLOORBEAM SEAT RAIL AT FR 66, Y1292 RT; FABRICATED A NEW REPLACEMENT FLOORBEAM SEAT RAIL; INSTALLED REPAIR PART IAW A320 SRM 51-42-11 FIG 9-14, 16 & 17, PG 7-10, 12.